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Patented Mair. 31,1891.-

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J. A. DECKER 8U J. GOEBPIL. APPARATUS POR REGULATING 'PHP OONSISTENCY @PWOOD PULP. N0. 449,251.

.(No Moel.) 2 Sheets-Sheet 2.l J. A. DECKER & J. GOEBEL.

APPARATUS POR REGULATING THB GONSISTBNGY QP Woon PULP. No. 449,251. 4Patented-MaP. 31, 1891.

A mm JOHN A. DECKER AND JOHN GOEBEL,

PATENT OFFICE.

OF BERLIN FALLS, NEW HAMPSHIRE;

SAID DECKER ASSIGNOR TO CLARA L. DECKER.

APPARATUS FOR REGULATING THE CONSISTENCY OF WOOD PULP.

SPECIFCATION forming part of Letters Patent No. 449,251, dated March 31,1891.

Application filed August 22, 1889.

T0 all whom it may concern.-

Be it known that we, JOHN A. DECKER and JOHN GOEBEL, citizens of theUnited States, residing at Berlin Falls, in the county of Coos and Stateof New Hampshire, have invented certain new and useful Improvements 'inApparatus for Regulating the Consistency of Vood Pulp; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to gures of reference marked thereon, whichform a part of this specification.

This invention relates to machines for regulating the consistency ofWood pulp. In the production and manufacture of paper, particularlynews, so called, a large proportion of what is termed mechanical pulp isemployed.

Our invention relates to and is embodied in a machine by which theproper percentage of liquid or water employed in the wet grindingprocess for producing wood pulp is to be extracted. This machine isespecially adapted for use in places where a pulp and paper mill arecombined, as it is found to be best to take the pulp directly from thewood-pulp machine and deliver it to the beating-engine in the properconsistency-that is, a certain amount of water must be extractedtherefrom prior to such introduction and mixture with the hard stock inthe beating or grinding engines. To extract this superliuous water,which may vary more or less, according to circumstances, is the objectof our invention.

The said invention consists in the construction and combinations ofparts, as hereinafter more particularly set forth and claimed.

In the drawings, Figure 1 is a plan of a machine embodying ourinvention, and Fig. 2 a vertical transverse section on line c .fc ofFig. 1. Fig. 3 is an end view of the said machine, showing the lever foroperating the movable dam. Fig. 4 is a plan with the pivotal frame andthe operating parts mounted therein thrown back from off the vat and itscylinder. v

In said drawings, 1 represents a rectangular water-tight receptacle,which contains or saai N6. 321,621. (No model.)

forms a vat 2, preferably semicircular in cross-section or approximatingin shape to a portion of a cylinder. fA cylinder 3 is eccentricallyplaced therein in most instances, and is open at both ends, which areencircled by packing-rings 25. The periphery of the latter is coveredwith fine wire-cloth. IVithin this vat and extending its entire lengthalong the feed or delivery edge 4 is placed a trough 5. This part of thevat is termed the feed side, since it is here the pulp mixed with waterand coming from the wood-pulp machine (not shown) is delivered by thespout 6 into the trough 5, whence it iiows over the edge 4 of the vat.This edge of the vat is located in a horizontal plane somewhat above theopposite or discharge side 7 of the vat, for purposes hereinafterspecified. Said discharge side is adapted to deliver into a spout 8,which may connect directly with the beating-engines or lead to astuE-chest or other suitable repository. Each open end of the cylinderis in proximity to an outlet-passage 26 through the fralne.

The cylinder is to be continuously revolved by a pulley and some primemotor when the machine is in operation to prevent the pulp from packingagainst the periphery, and thereby prevent a proper discharge of water.

Surmounting the receptacle 1 is pivotally mounted a swinging frame 9,with twin end castings or standards, in which is journaled a couch-roll20, the latter co-operating with the cylinder to remove such fewparticles as stick to the peripheryof the latter, and which do not passfrom the vat by way of the discharge side. Said roll is spring mountedand is cleansed or freed from such wood pulp as it collects from thecylinder by means of a doctor or scraper 10, aligned above and over thedischarge-spout 8 in such manner that this pulp as it is removed fromthe surface of the couchroll drops into Said spout 8 and again joins'the mass of wood pulp and water discharging through the latter.Connecting-rods or staybolts 12 12 unite said castings and keep thecouch-roll in place.

From the above arrangement it is evident that wood pulp, with anexcessive amount of water from the wood-pulp machine, is continuouslydelivered by way of the spout 6 to the IOO trough or receiver 5, whenceit flows over the delivery side 4 of the vat for its entire length,flows through and lls the vat or that part marked 13, which is formed bythe bottom of said vat and the perforated periphery of the cylinderadjacent, and thence passes over the discharge side 7 of said vat and isdelivered into the spout 8. During its passage throughthe vat a certainamount of Water escapes through the wire-cloth which covers thecylinder; but such amount would be constant unless some steps were takento provide for a variable areaof wetted surface of the cylinder.

It is obvious that with a given amount of wetted surface-that is, whenthe discharge side of the vat isin a fixed or predetermined planetheamount of water extracted in a given unit of time must be substantiallya fixed quantity; but by creating a movable gate or dam the wettedsurface of the cylinder maybe made much greater. As aconsequen'ce, morewater is extracted and the consistency of the wood pulp is increased.Diminution of the wetted surface produces just the opposite effect-thatis, the consistency of the wood pulp is reduced or made thinner, sinceless water is extracted.

Te have shown a metallic plate 14 ver? position. Guides 21, castin theend standards of the frame 9, serve to direct the dam in ver- .ticalpaths of movement and steady it relatively to the discharge side of thevat. Further, to prevent the water charged with wood pulp from flowingaround the ends of the dam vertical cut-s 24 are made in the ends of thevat and receive the extremities of the plate 14 moving therein.

What We desire to claim is- I1. Thel combination, with a receptacle 1, avat 2, a Wire-cloth-covered revoluble cylinder 3, a delivery side 4,feed trough 5, connected to said vat by said delivery side, a dischargesi'de 7 and an emptying-spout S, united to said vat thereby, of amovable gate 14, its rocking shaft 18, and the lever 19, by whichadjustment of saidfgate is effected, substantially as set forth.

2. The receptacle 1, a vat 2, a foraminous revoluble cylinder 3, andfeed and discharge spout's connecting with opposite sides of said vat,in combination with the movable gate 14, its guides2l, thelever 19, andthe actuating-rod 18, having prongs 16,which engage said gate, saidlever holding the gate in any position to change the horizontal plane ofdischarge, substantially as set forth.

3. In combination with a vat and a wire cylinder revolving therein, aspout 8, a pivotal frame 9, a couch-roll 20, supported by said frame incontact with said cylinder, and a'doctor 10 upon the rear side of saidcylinder, discharging any pulp received into. the spout 8, substantiallyas set forth.

In testimony whereof We affix our signatures in presence of twowitnesses.

JOHN A. DECKER. JOHN GOEBEL.

Witnesses:

H. WARREN JoHNsoN, R. H. CHAMBERLIN.

